gh-137146: Fix unicode characters in IPv6 Zone ID

Author: mauricelambert

Lib/urllib/parse.py

@@ -466,7 +466,7 @@ def _check_bracketed_host(hostname):
         ip = ipaddress.ip_address(hostname) # Throws Value Error if not IPv6 or IPv4
         if isinstance(ip, ipaddress.IPv4Address):
             raise ValueError(f"An IPv4 address cannot be in brackets")
-        if "%" in hostname and not re.match(r"\A(%[a-fA-F0-9]{2}|[\w\.~-])+\z", hostname.split("%", 1)[1]):
+        if "%" in hostname and not re.match(r"\A(%[a-fA-F0-9]{2}|[\w\.~-])+\z", hostname.split("%", 1)[1], flags=re.ASCII):
             raise ValueError(f"IPv6 ZoneID is invalid")
 
 # typed=True avoids BytesWarnings being emitted during cache key